Sound absorber arrangement and sound-insulated room

Abstract

The present invention relates to a sound absorber arrangement comprising multiple sound absorber elements that are arranged in a room having walls and a ceiling that closes off the room at the top. Multiple adjacently situated sound absorber elements form one or more absorber strips that extend(s), at least in sections, along an upper abutting edge extending between the wall and ceiling of the room. The sound absorber elements have a width of 200-400 mm and a thickness of 40-65 mm. The sound absorber elements have a length-specific flow resistance in the range of 5-20 kPa*s/m.sup.4. The invention further relates to a sound-insulated room having such a sound absorber arrangement.

Claims

1. A sound absorber arrangement comprising multiple sound absorber elements made of expanded glass granulate that are arranged in a room having walls and a ceiling that closes off the room with a size of 40 m.sup.2 to 130 m.sup.2 at the top, wherein multiple adjacently situated said sound absorber elements form one or more absorber strips that extend, at least in sections, along an upper abutting edge extending between the wall and ceiling of the room; the sound absorber elements have a width of 200-400 mm and a thickness of 40-65 mm; and the sound absorber elements have a length-specific flow resistance in the range of 8-10 kPa*s/m.sup.2.

2. The sound absorber arrangement according to claim 1, wherein the sound absorber elements are made of expanded glass granulate having a particle size of 0.25-4 mm, the granulate being either sintered in the shape of a board or joined to a binder, and the length-specific flow resistance being in the range of 8-9 kPa*s/m.sup.2.

3. The sound absorber arrangement according to claim 1, wherein the one or more absorber strips are fastened directly to a fastening surface of the wall or the ceiling of the room without a cavity remaining between the sound absorber elements and the fastening surface.

4. A sound-insulated room with a size of 40 m.sup.2 to 130 m.sup.2 for living, work, or entertainment purposes, having walls, a ceiling that closes off the walls at the top, and at least one sound absorber arrangement according to claim 1 arranged on a wall or ceiling surface of the room.

5. The sound-insulated room according to claim 4, wherein at least one of the one or more absorber strips of the at least one sound absorber arrangement extends circumferentially at the upper edges of the room.

6. The sound-insulated room according to claim 4, wherein the sound-insulated room includes multiple of the one or more absorber strips, each absorber strip extending, at least in sections, at an upper edge of the room.

7. The sound-insulated room according to claim 4, wherein the room is divided into acoustic cells, each having a base area no greater than 130 m.sup.2, this division being created by the sound absorber elements that are fastened to the ceiling.

8. The sound-insulated room according to claim 4, wherein the one or more absorber strips are integrated into the ceiling or wall of the room.

9. A sound-insulating room for living, work, or entertainment purposes, having walls, a ceiling that closes off the walls at the top, and at least one sound absorber arrangement according to claim 2 arranged on a wall or ceiling surface of the room.

10. A sound-insulating room for living, work, or entertainment purposes, having walls, a ceiling that closes off the walls at the top, and at least one sound absorber arrangement according to claim 3 arranged on a wall or ceiling surface of the room.

11. A sound-insulated room according to claim 5, wherein the room is divided into acoustic cells, each having a base area no greater than 130m.sup.2, this division being created by the sound absorber elements that are fastened to the ceiling.

12. A sound-insulated room for living, work, or entertainment purposes with walls, a ceiling that closes off at the top of the wall and at least one sound absorber arrangement arranged on a wall or ceiling surface of the room according to claim 1, wherein the room is divided into acoustic cells, each having a base area no greater than 130m.sup.2, this division being created by the sound absorber elements that are fastened to the ceiling.

13. The sound-insulated room according to claim 1, wherein the one or more absorber strips are integrated into the ceiling or wall of the room.

14. The sound absorber arrangement according to claim 1, wherein the one or more absorber strips are fastened directly to a fastening surface of the wall or the ceiling of the room without a cavity remaining between the sound absorber elements and the fastening surface.

15. The sound absorber arrangement according to claim 2, wherein the one or more absorber strips are fastened directly to a fastening surface of the wall or the ceiling of the room without a cavity remaining between the sound absorber elements and the fastening surface.

16. The sound absorber arrangement according to claim 3, wherein the one or more absorber strips are adhesively affixed to the fastening surface of the wall or the ceiling of the room.

17. The sound-insulated room according to claim 8, wherein the one or more absorber strips terminates in flush alignment with the ceiling or wall.

18. The sound-insulated room according to claim 13, wherein the one or more absorber strips terminates in flush alignment with the ceiling or wall.

19. The sound absorber arrangement according to claim 14, wherein the one or more absorber strips are adhesively affixed to the fastening surface of the wall or the ceiling of the room.

20. The sound absorber arrangement according to claim 15, wherein the one or more absorber strips are adhesively affixed to the fastening surface of the wall or the ceiling of the room.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further particulars and advantages of the sound absorber arrangement according to the invention and of the sound-insulated room thus equipped result from the following description of one preferred embodiment, with reference to the drawings, which show the following:

(2) FIG. 1 shows a ceiling soffit, not true to scale, of a sound-insulated room according to the invention;

(3) FIG. 2 shows an absorber strip situated at an upper edge of the room according to the invention; and

(4) FIG. 3 shows a diagram for illustrating measured values of the reverberation time in differently configured rooms, over a broad frequency range.

(5) FIG. 4 shows a ceiling soffit, not true to scale, of a sound-insulated room divided into two acoustic cells according to an embodiment of the invention.

DETAILED DESCRIPTION

(6) FIG. 1 shows a ceiling soffit, not true to scale, of a sound-insulated room 01 according to the invention, which represents the upper edge area of the room 01. The base area of the room is preferably 40-130 m.sup.2. The room is equipped with a sound absorber arrangement according to the invention. For this purpose, a sound-absorbing absorber strip 03 that extends circumferentially along the abutting edges 02 is arranged at the upper abutting edges 02 of the room 01. The absorber strip 03 may be situated either on the ceiling or on the wall of the room 01, and in each case extends to the corner formed between the wall and the ceiling (abutting edge). There is a strong, preferably full-surface connection between the ceiling and the absorber strip 03 or between the wall and the absorber strip 03, for example in the form of an adhesive connection or a mechanical connection, for example by means of clamps. The wall or ceiling may have a recess for complete or partial accommodation (in the cross section) of the absorber strip 03. The recess is particularly preferably designed in such a way that the absorber strip 03 may be fully introduced, thus terminating in flush alignment with the ceiling or wall.

(7) The absorber strip 03 is made up of one, or preferably multiple, sound absorber element(s) made of a nonductile foam, preferably a glass-based foam with an expanded glass granulate component. This material is well suited for sound insulation, and is easy to process. The sound absorber elements have a length-specific flow resistance in the range of 8-10 kPa*s/m.sup.2, preferably 8-9 kPa*s/m.sup.2.

(8) The absorber strip preferably has a width between 250 mm and 500 mm and a thickness of 25 mm to 60 mm. The absorber strip 03 preferably has a panel-shaped design. To form a circumferential absorber strip 03, multiple sound absorber elements are continuously lined up in a row without spaces in between. In alternative embodiments, the absorber strips 03 may extend at the upper abutting edges of the room 01 only in sections.

(9) FIG. 2 shows an absorber strip 03 arranged on an upper edge 02 of the room 01 according to the invention. The reflections of diffuse sound waves occurring in this edge area are illustrated in a greatly simplified manner by means of arrows. The incident sound waves are reflected primarily in the region of the upper edge of the room, on the wall and the ceiling, as the result of which a particularly good absorption effect may be achieved by means of absorber strips 03.

(10) FIG. 3 shows a diagram with multiple measured value curves of the reverberation time over a broad frequency range. The individual curves have been recorded in the same room, having a base area of 1020 m, and the walls and the ceiling are made of standard reinforced concrete.

(11) Curve 1) shows the course of the reverberation time in the original room, i.e., without installation of the sound absorber arrangement.

(12) Curve 2) shows the reverberation time after installation of the absorber strips that are mounted circumferentially in the room, on the ceiling, in each case extending to the upper abutting edge. The reverberation time decreases uniformly by approximately 0.3-0.4 s over all frequencies. This result is not quite satisfactory, and is attributed to the fact that the room has a base area that is much larger than 120 m.sup.2.

(13) Curves 3), 4), and 5) show the reverberation times in the room when the room has been divided into acoustic cells of 120 m.sup.2 each. This division has been carried out in each case by mounting the same sound absorber elements on the ceiling in the interior of the room along straight lines, resulting in a grid with areas of 1200 m.sup.2, 2100 m.sup.2, and 450 m.sup.2. It is apparent that the reverberation times are drastically reduced by more than 1 s over the entire frequency range. The surprising effect occurs in acoustic room sizes smaller than 100 m.sup.2. The acoustic absorption power may even be improved in an under-proportional manner, compared to the described sound absorber arrangement, by multiple installations. The absorber design according to the invention thus shows an optimum in relation to the installed quantity of absorbers and the achieved absorption power.

LIST OF REFERENCE NUMERALS

(14) 01sound-insulated room 02upper edges 03absorber strip